Claims
- 1. A system for continuously preparing and continuously casting a polymerizable prepared syrup comprising a mixture of a first liquid and at least a second liquid, said system comprising a first tank for containing a supply of said first liquid, a second tank for containing a supply of said second liquid, interspaced continuously running belt spans having side sealing gaskets and forming a continuously traveling casting space having an entrance, mixing means for continuously intermixing said liquids to form said mixture and for continuously feeding this mixture to said entrance, first pump means having a connection with said first tank for continuously pumping said first liquid from said first tank at least at one constant flow rate to said mixing means, and second pump means having a connection with said second tank for continuously pumping said second liquid from said second tank at least at one constant flow rate to said mixing means; and in which at least one of said pump means and its said connection comprises a metering tube having an upper end connection with the one of said tanks from which that one of the pump means pumps, said upper end connection including a valve means automatically responsive to close when a liquid level rises in said tube to a predetermined high level and to open when said liquid level falls to a predetermined low level, said metering tube having a lower end connection, and a metering pump receiving liquid from said lower end connection and having an output connection with said mixer, said metering tube being vented at its top so that said metering pump is relieved of any pressure conditions in said one of the tanks.
- 2. The system of claim 1 having means for determining when said metering pump should deliver a volume of liquid equal to the volume of liquid contained in said metering tube between said high and low levels, and for providing a signal in the event of any difference in said volumes.
- 3. The system of claim 1 in which to make said valve means automatically responsive to said levels the lower end of said metering tube has a diaphragm responsive to the liquid pressure in said tube, means being provided for making said valve responsive to displacement of said diaphragm.
Priority Claims (2)
Number |
Date |
Country |
Kind |
48-8161 |
Jan 1973 |
JA |
|
48-8167 |
Jan 1973 |
JA |
|
Parent Case Info
This is a division, of application Ser. No. 434,064, filed Jan. 17, 1974, now U.S. Pat. No. 3,966,693.
US Referenced Citations (8)
Divisions (1)
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Number |
Date |
Country |
Parent |
434064 |
Jan 1974 |
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